Graphql-engine: Localization (l11n) strategy with Hasura for getting data in given locale

[pronevich]

Hi, I'm thinking about how to better implement localization with Hasura Engine and my thought that this should be implemented on HE side somehow.

One possible solution is by send -H "Accept-Language: en_US" header for example, but what will do with this HE to get right localized data from the right column - I have no idea :) This way works Yelp GraphQL API

Currently, I'm sending locale in where clause of GQL input. Here is an example:

Table products: id PK, price, type
Table products_translation:product_id FK, lang, name, description
Hasura array relationship: productValues products_translation :: product_id → id

Query:

{
  products {
    id
    type
    productValues(where: {lang: {_eq: "en_US"}}) {
      name
      description
    }
  }
}

[coco98]

@pronevich You can set up hasura permissions that pick this up from the header which would have a similar effect to sending the Accept-Language header.

Check it out here:
https://l11n-hasura.herokuapp.com/console/api-explorer
https://l11n-hasura.herokuapp.com/console/data/schema/public/tables/products/permissions

If you look at the user role's select permission you'll see a header x-hasura-lang is used.

Now if you try a graphql query with the right headers (these headers can be sent along with the auth token in production, or can be sent as is if you're using HASURA_GRAPHQL_UNAUTHORIZED_ROLE)

[pronevich]

Thanks, @coco98 I was thinking that it is not possible to set _x-hasura_ headers from a client, now I see that this is possible and works great!

[barbaraDorame]

Do you guys have any project example configuration for this? I want to accomplish something like @coco98 but the links in his post are broken. Thanks for the help in advance

[Bessonov]

@pronevich @coco98 the example doesn't work anymore. Can you please document it here for further reference?

[pronevich]

@Bessonov send x-hasura-lang header from client and configure SELECT permissions in console based on x-hasura-lang